\(n_{H_2}=\dfrac{1.12}{22.4}=0.05\left(mol\right)\)

\(Zn+2HCl\rightarrow ZnCl_2+H_2\)

\(0.05..............................0.05\)

\(m_{Cu}=9.65-0.05\cdot65=6.4\left(g\right)\)

\(\%Cu=\dfrac{6.4}{9.65}\cdot100\%=66.32\%\)

\(\%Zn=100-66.32=33.68\%\)

tham khảo ở đây nha:

https://hoidap247.com/cau-hoi/2130844

nH2=0,1(mol)

PTHH: Mg + 2 HCl -> MgCl2 + H2

0,1__________0,2___________0,1(mol)

MgO + 2 HCl -> MgCl2 + H2O

0,05____0,1___0,05(mol)

mMg=0,1. 24= 2,4(g) -> mMgO=4,4-2,4= 2(g) -> nMgO=0,05((mol)

b) %mMg= (2,4/4,4).100=54,545%

=> %mMgO=45,455%

c) nHCl=0,3(mol) -> mHCl=0,3.36,5=10,95(g)

=> mddHCl=(10,95.100)/7,3=150(g)

\(n_{H_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)

a.

\(CuO+2HCl\rightarrow CuCl_2+H_2O\)

\(Mg+2HCl\rightarrow MgCl_2+H_2\)

b.

\(n_{Mg}=n_{H_2}=0,1\left(mol\right)\Rightarrow m_{Mg}=0,1.24=2,4\left(g\right),m_{CuO}=12-2,4=9,6\left(g\right)\)

c. 

\(m_{muối}=m_{CuCl_2}+m_{MgCl_2}=0,12.135+95.0,1=25,7\left(g\right)\)

\(n_{H2}=\dfrac{8,96}{22,4}=0,4\left(mol\right)\)

\(Mg+H_2SO_4\rightarrow MgSO_4+H_2\)

\(n_{H2}=n_{H2SO4}=0,4\left(mol\right)\)

\(\Rightarrow C\%_{ddH2SO4}=\dfrac{0,4.98}{200}.100\%=19,6\%\)

\(n_{Zn}=\dfrac{3,25}{65}=0,05mol\)

a)\(Zn+2HCl\rightarrow ZnCl_2+H_2\)

   0,05    0,1          0,05       0,05

b)\(m_{ZnCl_2}=0,05\cdot136=6,8g\)

c)\(V_{H_2}=0,05\cdot22,4=1,12l\)

PTHH: \(Mg+2HCl\rightarrow MgCl_2+H_2\uparrow\)

a+b+c) Ta có: \(n_{HCl}=\dfrac{18,25}{36,5}=0,5\left(mol\right)\)

\(\Rightarrow n_{H_2}=0,25\left(mol\right)=n_{MgCl_2}\) \(\Rightarrow\left\{{}\begin{matrix}m_{MgCl_2}=0,25\cdot95=23,75\left(g\right)\\V_{H_2}=0,25\cdot22,4=5,6\left(l\right)\end{matrix}\right.\)

d) PTHH: \(CuO+H_2\xrightarrow[]{t^o}Cu+H_2O\)

Theo PTHH: \(n_{Cu}=n_{H_2}=0,25\left(mol\right)\) \(\Rightarrow m_{Cu}=0,25\cdot64=16\left(g\right)\)